Wilwood Rear Dynalite/MC4 Kit for Modified GM 12-Bolt C-Clip-Eliminator Axles, Black Calipers and 12.19-Inch Rotors — Selected 1964–1974 Applications

This rear conversion is for a modified Chevrolet-type 12-bolt axle with aftermarket C-clip eliminators and the specified 2.91-inch offset. Black Dynalite service calipers and separate MC4 parking units share 12.19-inch plain rotors. Disc brake system design and manufacturing are Wilwood Engineering’s focus. Bill Wood founded the Camarillo, California company in 1977; its range spans brake rotors, master cylinders, calipers, fittings, valves and brake lines for motorsport, specialized and street-performance applications. The choice of individual components depends on the complete brake system.

Technical Details

• Manufacturer: Wilwood
• Manufacturer part number: 140-14224
• Kit classification: Rear Brake Kits - Street Performance
• Axle position: Rear Kits
• Brake Type: Disc; Parking
• Selling unit: Sold as a kit.
• Master Cylinder Included: No
• Brake Booster Included: No
• Brake Lines Included: No
• Rotor Outside Diameter: 12.19 in; 309.63 mm
• Rotor Thickness: 0.81 in; 20.57 mm
• Rotor Material: Iron
• Surface Type: Plain Face
• Rotor construction: Vented
• Bolt Circle Diameter: 5 X 4.5 in; 5 X 114.3 mm; 5 X 4.75 in; 5 X 120.65 mm; 5 X 5 in; 5 X 127 mm
• Catalog stud / mounting-hole reference: 0.520 in; 13.21 mm
• Rotor surface finish: Plain
• Hat material: Aluminum
• Hat finish: Black E-Coat
• Hat offset dimension: 2.000 in
• Pistons per service caliper: 4
• Service-caliper piston construction: Stainless
• Service-caliper mount: Lug
• Caliper body construction: Forged aluminum
• Caliper Color: Black
• Caliper Finish: Black Powder Coat
• Caliper Inlet Port Diameter: 1/8-27 NPT
• Caliper family: Dynalite
• Pad compound: BP-10
• Minimum wheel guidance (clearance drawing required): 15 in; 381 mm
• Required rear axle / flange: 12 Bolt C-Clip Eliminator
• Catalog axle-offset reference: 2.91 in; 73.91 mm
• Spindle Included: No
• Mounting Hardware Included: Yes
• Separate wheel hubs included: No

Fitment & Compatibility

This is a rear axle conversion for modified GM 12-bolt housing ends using customer-supplied C-clip-eliminator bearing assemblies and a 2.91-inch axle offset. The vehicle table's Ridetech front-spindle descriptions cannot establish rear fitment: check the actual axle-end bolt pattern, bearing stack and 3.06-inch registration ring in DS-1184. MC4 parking cables, cable adapters and hydraulic hoses are separate. Verify the non-staggered layout and conditional 15-inch wheel clearance.

Listed models: Chevelle; 442; Beaumont; Camaro; Apollo. Use the fitment table below for the individual years, submodels and equipment conditions.

Wilwood product specifications · Installation instructions · Technical bulletin

With more than 20 years of parts and fitment experience, PMB Performance can help compare the existing brake assembly with the required component.